Thank you, it actually was that both the faces were conflicting. I now noticed I do have a compile error, and I could use some help with that. I got an error that said:
can't load skybox file skybox/sky_night_01 to build the default cubemap!
Can someone shine some light on this?

That error can be safely ignored. It simply means that the engine can't generate default cubemaps, which are purely cosmetic and so your map will work perfectly fine without them. You can also add your own cubemap entities and build them yourself so it doesn't matter that the default ones are missing.